Electric heater



Julyfl, 1928.A 1,677,281

A. C. GILBERT ELECTRIC HEATER Filed Feb. 5, 1926 Patented July 17, 419278. -L y .nutren stares rarer atraen o. GILBERT, or .New nevNN, ooNNnortonr, Assiettes, RY MnsNn fission MENTS, fro Trait A. e. GILBERT contrarre', or New vnavnN, conne-erreur, A con,H ronAfrroN or MARYLAND. y

n'tno'rno HEATER.

Application `filed February 5, 1926. Serial No. 86,243.

This invention relates to improvements in of sheet metal pressed into the form of 55 electric heaters of the radiant or reflector segment of a hollow sphere, and at the petype, audit has for its primary object to ripheral edge thereof is provided with a provide a heater of this character which back-turned flange 1G. The reflector has an will be inexpensive to manufacture and opening 17 disposed substantially in the eliicient` and safe in operation. center thereof for a purpose to be herein- 60 rinotherobject of the invention is to proafter described. Below the opening 17 the vide a heater of this type, having a .minireflector is pivotally secured to the pedestal' mum number ofparts andwherein all heat- 11 by means of a pair of-L shaped members ed or breakable parts are amply protected 18, which are spaced apart so that the deagainst interference. I vpending portions 19 thereof will straddlev 65 Still another object of this invention is to the end of the uprightportion of the provide improved means for holding the pedestal to which'they are secured by Ameans constituting the heater together, of a boltQland thumb nut Q2, upon flatparts i5 whereby a rigid structure is formed which tened portions 23, formed inthe sides of the free from the possibility oftheY same beupright portion 2l) at the upper end thereof. 70 coming loosened and dislocated relatively The L shaped members 1S are secured to th lo each other. reflector by means of bolts 2li. Y

To these and other ends,'the invention The pedestal 11 is formed from one piece go consists in the novel features and combinaof sheet metal, the upright 'portion Obeing tions of `the same to be hereinafter described hollow and generally cone-shaped, being 75 and Claimed, struck upwardly from thebase portion'lo. in the accompanying drawings: The peripheral edge of the base is turned Fig. lv is a vertical section through the outwardly as at 26, forming a shoulder 2T parts constituting the heater, certain parts upon which a disk 28 for closing the open not being shown in section for the sake of mouth at the base is clamped by turning the 80 clearness,` Y edge inwardly about the, disk as at` 29.

Figjis an enlarged front facel view of The guard 15 is formed of radially exthe parts of the heater, which support the tending' wires 30, which converge andare heating element and the holder therefor, the attached at one end to a washer 31. rihe heating element bei ng o1nitted; other ends of these wires also converge and 8,.) Fig. 3 ist-an enlarged vertical section on are secured tol a member 32, the use and l line 3-3 of Fig. 2, lthe heating element and form Vofwhich will be hereinafter described. the holder therefor not being in section for Between the converging ends of the wires the sake of clear-ness, and is an annular ring of wire 83, over which Fig. 4l is a section on line e-#l of Fig. 1. the'wires 30 extend and which holds the 90 The heater illustrated in the drawings wires 30 outwardly about and away from comprises a concave reflector 10, which is the heating element l2. pivot-ally secured to a pedestal or standard The socket member 13 Ahas an outer 40 11, il heating element 12 COIlIleCefl JCO il' ing'of insulating inateriall, in which the power source, (not shown) bymeans of the electrical connecting means for the heating 95 usual electrical connections within the element are located, in this instance, being holder or socket 13, through the wires let, of the'well known screw thread lamp socket and a guard 15 which surrounds the heattype. The socket casing 3l is provided with ing element and lies wholly within the revan' annular rib 35 of larger diameter than flector 10. The arrangement of the parts the body of the socket casing, whereby op- 100 and the structure ofthe heater, as generally positely directed shoulders 36 and 37 are outlined above, is the subject matter of a' formed at eacl sideof the rib 35. A porco-pending application No. 594,843, filed tion 38 of the body of the socket casingey October 16, 199.2, in the name of Alfred C. tends beyond one side of the rib `35, and Gilbert. The present application contemportion 39 extends beyond the other sideof 105 plates improvements over the heater dethe rib ln the instance illustrated, the scribed in the aforesaid application.V rib l is aV frustum of Vcone shape, the taper" The reflector l() is constructed of one' pieceV of which is toward the casing portion 38.

The member 32 is formed from a piece of sheet metal, and at its center portion is adapted to fit over the socket kcasing rib portion 35, as at 40. An inturned edge portion 4l is provided about a central opening 42. The inturned edge portionr 4l rests upon the shoulder 3G formed by the ribV 35, and the casing portion 38 extends through the opening' 42. The member 32 is extended laterally from the rib fitting portion 40 as at Y 43 and is then turned rearwardly to form the flange 44. ln this instance, the member 32 is substantially circular in form and the portion 40 is a frustum of cone shape. The laterally eXtending portion 43 encircles the base ofthe portion 40, and the flange 44 is in the form Yof an annulus and provid s a rear- Wardly directed edge 45. The converging ends of the Wires above mentioned as being secured to the member 32, areV secured to the portion 43 thereof by passing through openings therein and then being bent over, as at 47.

The socket member 13 is clamped to the reflector 10, by means of the member and the use of bolts 4G which pass through openings in the laterally extending portion 43 'of the member A32, between the inturned edge 4l and the reflector material around the opening 17in the reflector. An especially t1ght clam-ping acti-on is provided, due to the edge 45 being iu contact with the reflector surface, the bolts being free to spring the material of the portion 43 toward Y the reflector, thereby causing a continuous clampingstrain 'to be placed upon the shoulder 36 by the portion 4l of the member '32.

The yportion 39 of the socket member l13 extends through the opening 17 of the reflector l0, and being thus disposed the electrical connections thereon would be exposed. To avoid this, a closure member 52 is provided for the opening 17. The closure member 52 is generally cup-shaped and has a laterally extending flanged edge 48 about the openinouthwthereof. In the instance illusi trated, this flange is interposed between the shoulder 37 of the socket casing and the reflector material about lthe opening 17 there- 1n, whereby it is clamped between the same when thesocket is clamped to the reflector bythe bolts 46. The cup shaped portion 49 of the closure member 52Vexten ds rearwardly through the opening 17 and is provided With an opening substantially in the center thereof into which an insulating bushing 5l is vplaced for the protection of the Wires 14 which pass therethrough.

I do not claim herein the broad combina-V tion of elements in a heater of the type de-. scribed including' a concave reflector, a heating element, :i lheating element support and. a. guard for said heating element which surrounds the same and lies Wholly Within the reflector, or the form of guard, or, broadly,

flecior.

YVport 'for seid heating element,

said heating element, and inthe means to secure the guard and the heating ci ement support to the reflector, or other features claimed in my co-opending application, Serial No. 594,543, filed October 16, i922. l

lVhile l have illustrated and described a preferredv form of my invention, it is to be Vund'erstood that the same is not limited to the exact details shown, but is capable of many modifications and variations which Willlic within the spirit ot' the invention and the scope ot the appended claims.

Vihat I claim is:

l. fln an electric heater oil the type described, a reflector having an opening through a portion thereof, a heating element support having a portion presenting a shoulder, said shoulder resting upon the reflector about the opening` therein, another' shoulder upon said support, a member engaging the second mentioned shoulder and having a portion overlyn the reflector, and means to secure ythe portion of said member overlying` the reflector io clamp the support to said re- 2. In an electric heater of the type described, a reflector having ran opening through a portion thereof, a heating element support having a laterally projecting portion presenting a pair of loppositely directed shoulders, one of said shoulders' being adapted to engage the reflector adjacent the edge of' the opening` therein, a member engaging the other shoulder and having a portion i ilapted to overlie'the reflector, and means to secure the overlyingportion thereof toV thereflector, whereby the support is retained in position upon AsaidY reflector. Y

3. In an electric heater of the type dcscribed, a reflector having an opening through a portion thereof', a heatingelement support havingan annular rib Wherebj,T op positely directed shoulders are formed thereon, one of said shoulders bein adapted to rest upon the reflector mate ral about. the opening therein, an annular ring about said suiiport having an inwardly directed dange in engagementwith the other shoulder` said ring having` an outwardly directed flange over-lying said retiector, and means to secure said outwardly directed flange to said reflector. y y y `lnV an electric heater of the type described, a. reflector, a heating elen'ieni, a supand a Wire guard about cludi a member secured to said reflector. said member being adapted to support said heating element support and said Wire guard.

In an electric lheater of the type dcscribed. a refircror, a heating element havingv ihre: led end. :i threaded socket ment kber for l heating clement. .said .socket Air memberA having a projection upon the body ltl - ment having a base-plate, said base-plate having a portion in engagement with said annular rib, and another' portion overlying said reflector, and means to secure the overlying portion of said plate to said reflector Wherebysiid guard and said socket are secured together and to said reflector.

7. In an electric heater of the type described, a reflector having an opening therethrough in substantially the center thereof,

a heating element, a socket member for said heating element having an outer casing, said casing having a body portion adapted to extend through the opening of said reflector, and a rib encircling said body portion intermediate the ends thereof said ribs providing a pair of oppositely'directed shoulders, a member encirclingsaid casing and having a laterally extending part in engagement with one of said shoulders, and a laterally extending part overlying the surface of said reflector, means to secure saidmember to said reflector and radially extending wires secured to said last mentioned laterally extending part of said member and adaptedV to surround said heating element as a guard therefor.

8. In an electric heater of the type described, a reflector having an opening therethrough in substantially the center thereof, a heating element, a socket member for said heating element having an outer casing, said casing having a body portion adapted to extend through the opening of said reflector, and a rib encircling said body portion intermediate the ends thereof, said rib providing a pair of oppositely directed shoulders, a member encircling said casing and having a laterally extending part in engagement with one of said shoulders, and a laterally extending part overlying the surface of said reflector, a cover for the opening in said-reflector having a laterally extending part overlying the surface of said reflector and adapted to receive the casing body extending therethrough, and means to simultaneously secure said socket, said member and said cover to said reflector.

9. In an electric heater of the'type described, a concave reflector having an opening in the center thereof, a heating element, a heating element support including a rearwardly directed shoulder, a guard for said heating element including a member adapted to engage said support forward of said shoulder, to clamp said shoulder against the reflector portion surrounding the center opening therein, and means to secure said member to said reflector.

10.'In an electric heater of the type described, a concave reflector, ment, a heating element support, a guard for said heating element including 'a part adapted to engage said support to hold the same relatively to said guard, and means to secure said guard part to said reflector to retain said support relatively thereto.

1l. In an electric heater of the type scribed, a concave reflector having an opening in the center thereof, a heating element, a heating element support having a rearwardly directed end portion extending therefrom through the opening in said re- D flector, a cap for said support end portion extending through the salme opening and having a part engaging the reflector about the same opening, a part'of said support engaging said cap part, a guard for said heating element including a part adapted to engage said support, and means to secure said guardpart to said reflector loretain said support and cap thereto.

12.111 anl electric heater of the type described, a concave reflector having an opening in the center thereof, a heating element support having a rearwardly directed end portion extending therefrom through the opening in said reflector, a cap for said sup# port end portion extending through the same opening and having a part engaging the reflector about the same opening, a part of said support engaging said cap part, and means engaging said support to secure it and said cap to said reflector.

13. In an electric heater of the type described, a reflector, a heat-ing element, a support for said heating element, and a guard about said heating element, said guard including a member secured to said reflector, said member engaging said support to secure it and said guard to said reflector.

14. In an electric heater of the type described, a concave reflect-or having an opening in the center thereof, a heating element support having a rearwardly directed end portion extending therefrom and through the opening in said reflector, a cap for said support end portion having a part engaging the reflector about the same openiiig, and means to secure said support and said cap to said reflector, including a part in engagement With said support.

15. In an electric heater of the type described, a concave reflector having an opening in the center thereof, a heating element, a heating element support including a rear- -Wardly directed shoulder, a member adapted toengage said support forward of said a heating ele-l shoulder to clamp said shoulder against the reflector portion adjacent the opening therein, and means to secure said member to said `portion extending,` therefrom and through the opening in said reliector, a cap 'for said support end portion haring` a part engagingl the reflector about the same opening, and a guard tor said heating element including' a part adapted to engage said support, and means to secure said guard part 'to said reflector to retain said support and cap thereto.

17. In an electric heater ot the type described, a concave reilector hai/'ing an opening' i'n the center' tl ere-oi", a heating element, a heating,` element support including a rearn Wardly directed shoulder, a d a rearwardly directed end portion extending through the opening' in said retiector, a cap tor said support end 'portion' having; a said reflector about the' saine opening, a member adapted to engagc'snid support torward of said shoulder, and means to secure said member, said support ad said cap to said reflector'.

1S. In an electric heater ot the type described, a concave reflector having an opening' adjacentthe center thereof, a heating element extending said heating element to support the same, means to secure said socket to said reflector including` an annular plate in engagement part en raging outwardly from said re r Hector, a socket engaging the inner end of With said socket, means to secure said plate to said reflector, and Wire-like members secured to said plate and extending outivardly and converging beyond the outerY end ot said heating element to term a guard theretor.

V19. In an electric heater of the type described, a concave reflector having' an opening zuljacent the center thereof, a heating element extending outwardly `trom said re iector, a socket engaging` the inner end oi' said heating` element to support the same, means engaging` said socket to secure it to said reflector, and members secured to and extending` outwardly from said socket securing means and ciyinif'ergingl beyond the outer end or said, heating element to form a guard therefor.

20. In an electric heater of the t7 ie described, a concave reflector having an opening` adjacent the center thereof, aheating element extending` outwardly from said reflector, a socket engaging' the inner end of said heating element to support the same, means lo secure said socket to said reflector includino' an annular plate in engagement with said soeiiet, means to secure said plate to said reflector, a supporting ring,- spaced from and surrounding' said heating element intermediate the ends thereof, and wire-like members secured to said plate and `extendin` outwardly and over said supporting` ring and converging beyond the outer end of said heating element to form a guard therefor.

In witness whereof, I have hereunto set my hand this 2d day of February, 1926.

ALFRED C. GILBERT.. 

